Locking device for cores in film magazines



June 6, 1939. H. N. FAIRBANKS f 2,161,341

LOQKNG VICE FOR yCORES `IN FILM MAGAZINES lFiled han. 19, 1958 INVENTOR Fig2.

HnryNFairbaks W ATTORN S Patented June 6,51939 UNITED STATES yPATENT oFFicE Henry N. Fairbanks, lRochester, N. Y., assignor to Eastman Kodak Company, Rochester, N. Y., a corporation of New Jersey Application January 19, 1938, Serial No. 185,107 s claims. l(ci. 242-11) The present invention relates to an improved receive a film coil, a resilient member mounted arrangement for locking the film core in a film magazine against. rotation during transportation of the magazine and for automatically releasing the film core when the magazine is inserted into its associated apparatus. This invention constitutes an improvement over that disclosed in my U. S. Patent No. 2,051,206, issued August 18, 1936, both from the standpoint of structural design and of ease and reliability in operation.

Many types of locking device for magazine film cores are known to the. prior art. Some of such locking devices act continually upon the film core to provide a friction drag during operation of the magazine as well as during its removal from the apparatus. Others of such locking devices are automatically released when the magazine is inserted into the apparatus or when the control release is actuated for operation of said apparatus. The primary object of the present invention is the provision of a locking device to prevent rotation of a film roll within a film magazine, and which includes a resilient member within the support for the film core for engaging the film core to prevent rotation thereof and adapted upon relative axiall movement with respect to the support member to be disengaged -from said film core.

Another object of 'theinvention is the provision inserted into a hollow support member and extending through an opening thereof, to engage the film core, said resilient member being disengagedeither by co-operation of a bent portion vthereof with an opening in the hollow support member or by engagement of its end with an inclined surface within said hollow support member, or both.

A further object of the invention is the combination of the improved locking device according to the invention with a motion picture apparatus of the magazine type whereupon a protuberance in the magazine chamber of the apparatus enters the hollow support member and causes axial 45 movement of the resilient member to disengage it from the f'llm core. 4

Other and further objects of the invention will be.apparent to those skilled in the art from the following disclosure.

50 The above and other objects of the invention are embodied in a locking device for preventing rotation of ha film magazine, which locking device comprises in combination a hollow support member provided with an'opening, a core rotatably 55 mounted on the support memberand adapted to in such a locking device of a resilient member for axial movement within the support member and having a portion normally engaging the film core to prevent rotation thereof, and co-operating surfaces on the support member and on the resilient member which are arranged so that upon relative axial movement between said support member and said resilient member the latter is disengaged from the lm core. Specifically, such a locking device is particularly suited to ay lo film magazine adapted for lateral insertion into a motion picture apparatus containing a protuberance which is adapted upon insertion of the magazine to extend into the hollow support member and axially move said resilient member. 1K5

Reference is hereby made to the accompanying drawing wherein similar referencey characters designate similar elements and wherein: f

Fig. l` is a side elevation of a film magazine equipped-with a locking device of the invention.

Fig. 2 is a section through a motion picture camera of the, magazine-type and through the film magazine taken'on the line 2--2 of Fig. 1 and illustrating the operation of the resilient members by the protuberances in the magazine chamber when the film magazine is inserted thereinto. I

Fig. 3 is a longitudinal section ofthe film core, Fig. 4 is an end view of one end of the film core, and Fig. 5 is an end view of the other end of the film core.

Fig. 6 is a section through the film core and supp'ort member showing the locking device of the invention in locking position.

Fig. 7 is a perspective view of the resilient member of the locking device.

Although the locking device of the invention has been illustrated with lrespect to a iilm magazine associated with a motion` picture camera, it is to be understood that the invention may be applied with equal advantages to other motion picture apparatus of the magazine type. Furthermore, the film rolls have been illustrated herein as being wound on film cores but it is to beunderstood that my invention also encompasses a locking device for engaging the core or hub member of a spool to prevent rotation there-` of under the conditions set forth.

Referring now to the illustrated embodiment of my invention, the lm magazine comprises a 50 magazine casing Ill having a sidewall Il and a lateral edge wall I2. A cover I3 engages said lateral edge wall I2 to enclose the casing i0. 4'I'he fllm magazine is provided in conventional Vfashion with a film gate including a front gate 55 posite sides of saidwall II.

member I4 whichl is attached to the side wall II and including a pressure member I5 which is resiliently urged toward the front gate member vI4 by a spring I8 mounted between posts I1 which are secured to the side wall I I. The film F is provided in the regular way in a supply nlm roll I8 from which said nlm F extends between gate members I4 and I5' to the take-up film roll Both of the iilm rolls are woundA upon film cores 28. Each film core is preferably cylindrical, is provided with an axial hole 2I which fits a support member or spindle 22 fastened to the side wall II or .cover I3 of the film magazine.

The support member or spindle 22 for the supply film roll I8 isi' fastened to the side wall II by a collar 23 and a rivetedv flange 24 on op- The support or spindle 22 for thetake-up vfilm roll is fastened in the same manner to the cover I3.

'I'he support members or spindles 22 are each-V spindle 22 and into the longitudinal slots 3| of provided with a pair of opposed lateral openings 25 and each have a pair of inclined surfaces 28 at the closed end of said spindle 22.

Since the invention'is illustrated with respect to a reversible film magazine, the support memlbers 22 for the respective lm rolls are mounted on opposite sides of the magazine casing, the support members'and film cores 'being respectively inverted with respect to each other. Never; theless, it should be clearly understood that the invention is not confined in its application to a reversible lm magazine but may be utilized in all forms of film magazine.

Each of the lm cores 20 are provided with an annular groove 21 in one end thereof and which receives an inturned flange 28 formed inwardly from the side wall II or a flange 29 formed inwardly from the cover I3. Engaging teeth 3|! are also provided on the same end of the film cores 29 to extend through the openings provided respectively by the inturned anges 28 and 29.

The film cores 20 are also each provided with a` -pair of opposed longitudinal slots 3 I.

A resilientmember is mounted for axial movement within the hollow support member 22 and may comprise a U-shaped spring member 32 having a central portion'33 and a pair of legs 34, each leg 34 being provided with a bent portion 35 which presents an inclined surface along one side and a more abrupt surface along the other side. Said spring member 32, when inserted within the spindle 22, normally urges said bent portions 35 through the lateral openings 25 of the spindles `22 -into engagement with the longitudinal slots 3I on the interior of the film cores 20. Under this condition it is clear that the film cores 20 are positively locked againsthousing 38 closed by. a cover 31 and including a mechanism plate 38. The spring motor 39 is mounted in a known manner between mechanism plate 38.and a wall of camera housing 38 and' 4may be wound by a crank 40 and winding spindle \4I. A take-up clutch member 42.is rotatably mounted within a recess in mechanism plate 38. includes spring fingers 43 for engaging the teeth 30 of the film core 20 of the take-up film roll.

and is frictionally driven from the spring motory 39 bya gear train including gears 44 and -45.

. said magazine chamber 48.

A protuberance 48 is mounted upon the mechanism plate 38 and is located oppositethe hollow spindle 22 for the' supply film roll I8 while a protuberance 49 is mounted on the camera cover 31 opposite the hollow spindle 22 for the take+up iilm'roll I8.

The operation of the locking device of the invention will now be described. When the film magazine is not associated with the motion picture apparatus, the resilient members of the locking device are 1n the normal position or the position illustrated in Fig. 6. The bent portions 35 in each leg 34 of the spring member 32 extend through the lateral openings 25 of the hollow the film cores'29. This inter-engagement between said bent portions 35 and slots 3I prevents rotation of the film cores 29 and the lsupply and take-up film rolls I8 and I9 with respect tothe magazine casing III. At the same time the central portion 33 of each spring member 32 is'substantially flush with the open vend of hollow spindles 22 and thus prevents the entry of dust,

dirt or light into the magazine. lt will also be noted that the magazine assembly is quite free of any projecting parts so that several magazines may be readily stacked, one upon the other;

When the nlm magazine is inserted into the y -magazine chamber 48 and the camera cover 31 is closed, protuberance 48 engages the central portion 33 of the spring member 32 within the hollow openings 25'in spindles 22 and retracts said bent 4 portions 35 from the longitudinal slots 3I of film cores 20 or the inclined surfaces 28 at the'closed y end of spindles 22 engage the inner ends of spring members 32 also to cause retraction of bent portions 35 from longitudinal slots 3|. It is obvious that either camming action is sufliclent for dis-engagement of the spring member 32 from the illm cores 28. However, the inclined surfaces 28 also act normally to return the spring members 32to their normal position and insure that said spring members 32 will always be returned to such normal position in spite Aof their being vaxially displaced to such an extent that the summits of bent portions 35 engage the inner wall] ofthe hollow spindles 22.

It should be noted that upon such dis-engagement of the spring members 32 the film cores 20` are quite free torotate upon the spindles 22 and such rotation is in no way hamperedY by the locking device.

Since many variations of the present invention will occur to'those skilled in the art, said invention is not to be limited by the embodiment illustrated hereinv but is only to be limited by the scope of the claims which follow.

Havingnow particularly describedmy invention, what I ydesire to secure by. Letters Patent of the United States and what I claim is:

1. In a device to prevent rotation of a nlm roll within a nlm magazine, the combination with a magazine casing. a hollow support member therein and vprovided with an opening, and a core rotatably mounted on said support member and for receiving a nlm roll, of a resilient member mounted for axial movement within said support member and having Va portion normally extending through the opening therein to engage said core and prevent rotation ofsaid nlm roll, and co-operating surfaces on said support member and said resilient member arranged and adapted, upon relative axial movement therebetween, to remove said resilient member from engagement with said core.

2. In a device to prevent rotation of a nlm roll within a nlm magazine, the combination with a magazine casing, a hollow support member therein and provided withan opening, and a core rov tatably mounted on said support member and for receiving a nlm roll, of a resilient member mounted for axial movement within said support member and having a portion normally extending through the opening therein to engage said core and prevent rotation of said nlmroll, and an inclined surface on one of said members arranged and adapted, upon relative axial movement between said members, to retract the portion of said resilient member from engagement with said core.

3. In a device to prevent rotation of a nlm roll within a nlm magazine, the combination with a magazine casing, a hollow support member therein and provided with an opening, and a core rotatably mounted on said support member and for receiving a nlm roll, of a resilient member mounted for axial movement within said support member and having a bent portion normally extend-- ing through the opening therein to engage said core, the opening` in said support member and the bent portion of said resilient member being so arranged that axial movement of said resilient member movessaid bent portion against the edge of said -sperling and retracts said bent portion from engagement with said core.

4. In a device to prevent rotation of a nlm roll within a nlm magazine, the combination with a magazine casing, a hollow support member therein and lprovided with In opening. and a core.

rotatably mounted on said support member and for receiving a iilrnroil, of a resilient member mounted for axial movement within said support member and having a portion extending through the opening therein to engage said nlm core and having a portion enclosing the open end of said hollow support member, and co-op- Aerating surfaces on said support member and a magazine casing, a hollow support member in said casing, having an linternal inclined'surface and provided with an-opening, and a core rotatably mounted on said support member and for receiving a film roll, of a resilient member mounted for axial movement within said support member, having one portion normally extending through the opening therein to engage said core and having another portion located to engage the inclined surface in said support member upon axial movement of said resilient member therein and for retracting the nrst mentioned portion from engagement with said core.'

6. In a device to prevent rotation of a nim roll within a film magazine, the combination with a magazine casing, a hollow support member thereto engage said core, and having an end portion located resiliently to engage the inclined surface of said support member after said axial movement therein, said bent portion being retracted by axial movement of said resilient member within said support member and the resilient engagement of said end portion with said inclined surface reacting to return said resilient member to normal position.

7. In a device to prevent rotation of a nlm roll within a nlm magazine, the combination with a magazine casing, a hollow supportl therein providedl with a pair of holes oppositely disposed, and a nlm core provided with an axial bore and a pair of internal opposed slots and rotatably mounted on said support, of a U-shaped spring member within said support and having a pair of legs each including a bent portion for extending through the holes' in said support to engage the slots in said core and each adapted', upon laxial movement of said spring member, to engage the edges of said holes. and be retracted from engagement with said slots.

8. In a motion picture apparatus of the magazine type, the combination with a housing provided with a magazine chamber, and a protuberance in said housing and extending into said magazine chamber, of a nlm magazine casing adapted to be inserted into said chamber and including a hollow spindle provided with an opening and located to receive said protuberance when said casing is inserted into said housing, a nlm core rotatably mounted on said spindle, a spring member mounted for axial movement within said spindle and having a portion normally extending through said opening to engage said core, and co-'operating surfaces on said spindle and said springmember operative, upon relative axial movement of said spring member by said protuberance upon insertion of the nlm magazine casing into said chamber, to remove the portion of said spring member from engagement with saidnlnicore.A

HINRYNJ" 'fil Disclaimer banks, Rochester, N. Y. ILM MAGAZINES. Patent dated Jun 2,161,841. `Hen-ny N. Fair LOCKING- DEVICE FOR CoREs IN Dlsclaimer led Feb. 24, 1949, by 9h e asslgnee, Eastman Kodak Company. Hereby enters this disclaimer to claim 8 of said patent.

[Ocz'al Gazette Marc/L 29, 1949.] 

